Collar bone breaks are common in motorcycle sports, but they often leave ugly lumps if not fixed properly. Some of them require a rod inserted for a few months and then removed. Heavy shoulder impacts and helmet clips seem to be the source of them. A Leatt brace may help the helmet clips, but a shoulder impact is tough to defend against I suspect. The other common injury is breaking the small bones in the wrist. Hard to come back from those darn things.
Originally Posted by mike54
As bone breaks go, a collar bone isn't too painful and heals fairly quickly. You can be back on the bike in 4 to 6 weeks. Wrists and ankles really suck and can keep you off the bike for a long time. I've got to say broken ribs, while not too debilitating, were painful for an incredibly long time.